CN116709016A

CN116709016A - Multiplying power switching method and multiplying power switching device

Info

Publication number: CN116709016A
Application number: CN202210178265.5A
Authority: CN
Inventors: 许集润
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2023-09-05
Anticipated expiration: 2042-02-24
Also published as: WO2023160179A9; WO2023160179A1; CN116709016B

Abstract

The application provides a magnification switching method and a magnification switching device, which are beneficial to realizing smooth transition of preview images under the click switching operation of magnification and improving the zooming effect of terminal equipment. The method comprises the following steps: displaying a first preview image under a first multiplying power obtained by a camera; responding to the selection operation of the user on the second magnification, displaying L frame preview images corresponding to L transition magnifications, wherein the L transition magnifications comprise L magnifications between the first magnification and the second magnification, and L is more than or equal to 1 and is an integer; and displaying a second preview image under a second multiplying power acquired by the camera.

Description

Multiplying power switching method and multiplying power switching device

Technical Field

The present application relates to the field of terminals, and more particularly, to a magnification switching method and a magnification switching device.

Background

With the continuous development of terminal technology, users can realize more and more photographing functions through terminal equipment (for example, mobile phones), for example, cameras realize zooming functions through rate switching.

For example, the user starts preview photographing at a first magnification (e.g., 1 x) through the camera, and if the user wants to photograph a distant object through the terminal device, the user can switch the magnification by clicking a magnification icon at a second magnification (e.g., 5 x), and preview photographing is performed at the second magnification after the switching.

However, after the click switching operation of the magnification occurs, the view angle (FOV) of the camera is directly changed from the first magnification to the second magnification, so that the user can see that the preview image under the first magnification is directly changed to the preview image under the second magnification, and thus the problem of hard transition of the preview image exists, the zooming effect of the terminal device is poor, and the use experience of the user is reduced.

Disclosure of Invention

The application provides a magnification switching method and a magnification switching device, which are beneficial to realizing smooth transition of preview images under the click switching operation of magnification and improving the zooming effect of terminal equipment.

In a first aspect, a magnification switching method is provided, applied to a terminal device deployed with a camera, and the method includes: and displaying the first preview image under the first multiplying power acquired by the camera. In response to a user selection operation of the second magnification, displaying an L-frame preview image corresponding to L transition magnifications, wherein the L transition magnifications comprise L magnifications between the first magnification and the second magnification, and L is more than or equal to 1 and is an integer. And displaying a second preview image under a second multiplying power acquired by the camera.

In the present application, before the user's selection operation of the second magnification, the terminal device can obtain the first preview image by the first magnification. After the user selects the second multiplying power, the terminal device can display the L-frame preview images according to the L transition multiplying powers before displaying the second preview image, so that the L-frame preview images for transition are added before the first preview image is switched to the second preview image, the preview images displayed by the terminal device can be smoothly transitioned, the zooming effect of the terminal device is improved, and the use experience of the user is improved.

With reference to the first aspect, in certain implementation manners of the first aspect, before displaying the L-frame preview images corresponding to the L transition magnifications in response to a user selection operation of the second magnification, the method further includes: l transition magnifications are determined based on the first and second magnifications.

With reference to the first aspect, in certain implementation manners of the first aspect, determining L transition magnifications based on the first magnification and the second magnification includes: and determining L transition magnifications based on the first magnification, the second magnification, the switching duration between the first magnification and the second magnification, and the time interval between adjacent frames.

In the application, the terminal equipment can determine the L transition magnifications based on the switching time between the first magnification and the second magnification and the time interval between the adjacent frames, so that the smooth transition from the first magnification to the second magnification is facilitated to be completed in the switching time.

With reference to the first aspect, in certain implementation manners of the first aspect, determining L transition magnifications based on the first magnification and the second magnification includes: and determining the L transition multiplying powers based on the first multiplying power, the second multiplying power and the preset preview image frame number.

With reference to the first aspect, in certain implementations of the first aspect, the camera of the terminal device includes a first camera and a second camera, the first preview image is from the first camera, and the second preview image is from the second camera. The method further comprises the steps of: and starting the second camera. And acquiring images through the first camera and the second camera, wherein the images acquired by the first camera and the second camera at the same time node are shot based on the same transition multiplying power. When the difference between the quality of the Mth frame image from the second camera and the quality of the Nth frame image from the first camera is smaller than or equal to a preset threshold value, the first camera is closed, and the preview image displayed before the first camera is closed is from the first camera. The N-th frame image from the first camera is obtained by shooting at the same time point with the M-th frame image from the second camera based on the same multiplying power, N is more than or equal to M is more than or equal to 1, and N and M are integers.

For example, the second camera may acquire an image based on the first magnification at the same point in time as the first camera, but the terminal device displays a first preview image from the first camera, and the terminal device may turn on the second camera before the second camera acquires the image based on the first magnification, in which case m=n.

The terminal device may acquire an image based on the first magnification through the first camera, and display a first preview image from the first camera. After that, the terminal device may turn on the second camera, acquire images based on the same transition magnification at the same time point through the first camera and the second camera, and display a preview image from the first camera until a difference between the quality of the mth frame image from the second camera and the quality of the nth frame image from the first camera is less than or equal to a preset threshold, and turn off the first camera, where m+.n.

In the application, the terminal equipment can be used for making a picture through two paths of the first camera and the second camera, closing the first camera at a proper time, and realizing soft switching between the first camera and the second camera from opening the second camera to closing the first camera, thereby being beneficial to obtaining preview images with smoother transition.

In a second aspect, a magnification switching device is provided, including an acquisition module and a processing module. Wherein, the acquisition module is used for: acquiring a first preview image under a first multiplying power; and acquiring a second preview image at a second magnification. The processing module is used for: displaying a first preview image under a first multiplying power obtained by a camera; responding to the selection operation of the user on the second magnification, displaying L frame preview images corresponding to L transition magnifications, wherein the L transition magnifications comprise L magnifications between the first magnification and the second magnification, and L is more than or equal to 1 and is an integer; and displaying a second preview image under the second multiplying power acquired by the camera.

With reference to the second aspect, in certain implementations of the second aspect, the processing module is configured to: l transition magnifications are determined based on the first and second magnifications.

With reference to the second aspect, in certain implementations of the second aspect, the processing module is configured to: and determining L transition magnifications based on the first magnification, the second magnification, the switching duration between the first magnification and the second magnification, and the time interval between adjacent frames.

With reference to the second aspect, in certain implementations of the second aspect, the processing module is configured to: and determining L transition multiplying powers based on the first multiplying power, the second multiplying power and the preset preview image frame number.

With reference to the second aspect, in certain implementations of the second aspect, the camera includes a first camera and a second camera, the first preview image is from the first camera, and the second preview image is from the second camera. The processing module is used for: and starting the second camera. The acquisition module is used for: and acquiring images through the first camera and the second camera, wherein the images acquired by the first camera and the second camera at the same time node are shot based on the same transition multiplying power. The processing module is also used for: when the difference between the quality of the Mth frame image from the second camera and the quality of the Nth frame image from the first camera is smaller than or equal to a preset threshold value, the first camera is closed, and the preview image displayed before the first camera is closed is from the first camera. The Nth frame rabbit food from the first camera and the Mth frame image from the second camera are shot at the same time node based on the same multiplying power, N is more than or equal to M is more than or equal to 1, and N and M are integers.

In a third aspect, there is provided another magnification switching device comprising a processor coupled to a memory, operable to execute instructions in the memory to implement a method according to any one of the possible implementations of the first aspect. Optionally, the apparatus further comprises a memory. Optionally, the apparatus further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the magnification switching device is a terminal device. When the magnification switching device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the magnification switching device is a chip configured in the terminal device. When the magnification switching device is a chip configured in the terminal device, the communication interface may be an input/output interface.

In a fourth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuitry is configured to receive signals via the input circuitry and to transmit signals via the output circuitry such that the processor performs the method of any one of the possible implementations of the first aspect described above.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The specific implementation of the processor and various circuits is not limited by the present application.

In a fifth aspect, a processing device is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and to receive signals via the receiver and to transmit signals via the transmitter to perform the method of any one of the possible implementations of the first aspect.

Optionally, the processor is one or more and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processing may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing means in the fifth aspect may be a chip, and the processor may be implemented by hardware or by software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a sixth aspect, there is provided a computer program product comprising: computer program code which, when run, causes a computer to perform the method of any one of the possible implementations of the first aspect described above.

In a seventh aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program which, when executed, causes a computer to perform the method of any one of the possible implementations of the first aspect.

Drawings

FIG. 1 is an interface schematic diagram of a terminal device;

FIG. 2 is a schematic diagram of a point cut operation;

FIG. 3 is a schematic flow chart of a method of mapping a point cut operation;

Fig. 4 is a schematic structural diagram of a terminal device to which the embodiment of the present application is applicable;

fig. 5 is a block diagram of a software architecture of a terminal device to which an embodiment of the present application is applicable;

FIG. 6 is a schematic diagram of a point cutting operation according to an embodiment of the present application;

FIG. 7 is a schematic flow chart of a magnification switching method provided by an embodiment of the present application;

FIG. 8 is a schematic flow chart of another magnification switching method provided by an embodiment of the present application;

FIG. 9 is a schematic flow chart of yet another magnification switching method provided by an embodiment of the present application;

fig. 10 is an interface schematic diagram of a terminal device according to an embodiment of the present application;

FIG. 11 is a schematic block diagram of a magnification switching device provided by an embodiment of the present application;

fig. 12 is a schematic block diagram of another magnification switching device provided by an embodiment of the present application.

Detailed Description

The technical scheme of the application will be described below with reference to the accompanying drawings.

In Android ecology, a user may use a camera Application (APP) of a terminal device to perform a click switching (may be simply referred to as a click) operation of magnification. Therefore, objects at different distances can be shot to be common use scenes, and the richness of shot scenes is improved.

Fig. 1 is an interface schematic of a terminal device. Taking a terminal device as a mobile phone example, an interface a, an interface b and an interface c of the mobile phone are shown in fig. 1, wherein the interface a shows a plurality of applications in the mobile phone, and a user can click a camera icon to open a camera application to take a picture. After the user clicks the camera application, the mobile phone displays a b interface, wherein the b interface is a shooting interface. Illustratively, the b interface includes multiple magnification icons, the current camera magnification is 1x, and the user can click on different magnification icons to achieve different magnification switching. Illustratively, when the user clicks the magnification icon of 5x, the mobile phone may display a c interface where the magnification has been switched to 5x, and the mobile phone may obtain a preview image at a magnification of 10x.

Before the spot-cutting operation as shown in fig. 1, the mobile phone can display a preview image of an object to be photographed in the b interface at a magnification of 1x through the camera, and a field of view (FOV) of the camera is maintained at 1x. After the user clicks the 5x magnification icon, the mobile phone can display a preview image of the object to be photographed in the c interface through the camera at the magnification of 5x, and the FOV of the camera is maintained at 10x.

Fig. 2 is a schematic diagram of a point cut operation. Taking a terminal device as an example of a mobile phone, in fig. 2, a camera of the mobile phone may include a main camera lens and a tele lens. Before the user performs the pinch operation, the FOV of the main lens is maintained at a magnification of 1x for continued drawing to obtain a preview image, and the preview image is displayed on the display screen. Illustratively, when the user clicks the magnification icon of 10x at the point-and-cut time as shown in fig. 2 to perform magnification switching, the mobile phone may switch from the main camera to the telephoto camera, the FOV of the telephoto camera is maintained at the magnification continuation map of 10x to obtain a switched preview image, and the switched preview image is displayed on the display screen.

Fig. 3 is a schematic flow chart of a method 300 of mapping a point cut operation. The method 300 includes the steps of:

s301, the first camera is used for drawing and displaying under the first multiplying power.

S302, in response to a click operation of a user, the camera application sends a magnification switching request message to a hardware abstraction layer (hardware abstraction layer, HAL), wherein the magnification switching request message is used for requesting to switch from a first magnification to a second magnification, and the magnification switching request message comprises the second magnification. Accordingly, the hardware abstraction layer receives the magnification switching request message.

S303, the hardware abstraction layer sends a camera closing request message to the first camera, wherein the camera closing request message is used for requesting to close the first camera. Correspondingly, the first camera receives the camera closing request message.

S304, the first camera is closed, and the work is stopped.

S305, the hardware abstraction layer sends a camera start request message to the second camera, wherein the camera start request message is used for requesting to start the second camera, and the camera start request message comprises a second multiplying power. Correspondingly, the second camera receives the camera start request message.

S306, starting the second camera, and making a picture and displaying under a second multiplying power.

The image display device comprises a display screen, a camera, a display screen and a display screen. More specifically, the preview image may be displayed in a preview view frame constructed by the camera application.

It should be appreciated that during the nodding operation shown in fig. 3, the FOV of the camera jumps directly from the first magnification (which may be 1x in fig. 1 or fig. 2 described above) to the second magnification (which may be 5x in fig. 1 or 10x in fig. 2 described above) after the nodding operation occurs, which results in a jump in the preview image seen by the user, and the transition is hard, so that the zoom effect of the camera application is poor and the user experience is poor.

In view of this, the embodiments of the present application provide a magnification switching method and a magnification switching device, where when a user uses a camera application of a terminal device to photograph and preview, the terminal device may introduce a multi-frame transition preview image in a magnification point cutting process, so as to implement smooth transition of the preview image when the magnification point cuts, which is beneficial to improving a zoom effect of the camera application, thereby improving user experience.

Before describing the magnification switching method and the magnification switching device provided by the embodiment of the application, the following description is made.

First, in the embodiments shown below, terms and english abbreviations, such as preview images, magnification switching request messages, main shots, tele shots, etc., are given as illustrative examples for convenience of description, and should not be construed as limiting the present application in any way. The present application does not exclude the possibility of defining other terms in existing or future protocols that perform the same or similar functions.

Second, the first, second and various numerical numbers in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different preview images, different cameras, etc.

Third, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, and c may represent: a, b, or c, or a and b, or a and c, or b and c, or a, b and c, wherein a, b and c can be single or multiple.

The terminal device in the embodiment of the present application may be a handheld device, an in-vehicle device, or the like with a wireless connection function, and the terminal device may also be referred to as a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. Currently, some examples of terminals are: mobile phone (mobile phone), tablet, smart tv, notebook, tablet (Pad), palm, mobile internet device (mobile internet device, MID), virtual Reality (VR) device, augmented reality (augmented reality, AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned driving (self driving), wireless terminal in teleoperation (remote medical surgery), wireless terminal in smart grid (smart grid), wireless terminal in transportation security (transportation safety), wireless terminal in smart city (smart home), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (session initiation protocol, SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing device connected to wireless modem, vehicle device, wearable device, terminal device in 5G network or terminal device in future evolution, public mode of the application is not adopted for specific embodiments of the present application, and the present application.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wear by applying wearable technology and developing wearable devices, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

It should be understood that in the embodiment of the present application, the terminal device may be a device for implementing a function of the terminal device, or may be a device capable of supporting the terminal device to implement the function, for example, a chip system, and the device may be installed in the terminal. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices.

The terminal device in the embodiment of the present application may also be referred to as: a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, etc.

Fig. 4 is a schematic structural diagram of a terminal device to which the embodiment of the present application is applicable. As shown in fig. 4, the terminal device 400 may include: processor 110, external memory interface 120, internal memory 121, universal serial bus (universal serial bus, USB) interface 130, charge management module 140, power management module 141, battery 142, antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headset interface 170D, sensor 180, keys 190, motor 191, indicator 192, camera 193, display 194, and subscriber identity module (subscriber identification module, SIM) card interface 195, etc. It is to be understood that the configuration illustrated in this embodiment does not constitute a specific limitation on the terminal apparatus 400. In other embodiments of the application, terminal device 400 may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, such as: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, a display processing unit (display process unit, DPU), and/or a neural-network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors. In some embodiments, the terminal device 400 may also include one or more processors 110. The processor may be a neural hub and a command center of the terminal device 400, among others. The processor can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution. A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 uses or recycles. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. This avoids repeated accesses and reduces the latency of the processor 110, thereby improving the efficiency of the terminal device 400.

In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a USB interface, among others. The USB interface 130 is an interface conforming to the USB standard, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 130 may be used to connect a charger to charge the terminal device 400, or may be used to transfer data between the terminal device 400 and a peripheral device. And can also be used for connecting with a headset, and playing audio through the headset.

It should be understood that the interfacing relationship between the modules illustrated in the embodiment of the present application is illustrated schematically, and does not constitute a structural limitation of the terminal device 400. In other embodiments of the present application, the terminal device 400 may also use different interfacing manners, or a combination of multiple interfacing manners in the foregoing embodiments.

The wireless communication function of the terminal device 400 can be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like. The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in terminal device 400 may be configured to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied on the terminal device 400. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier, etc. The mobile communication module 150 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 150 can amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be provided in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs sound signals through an audio device (not limited to the speaker 170A, the receiver 170B, etc.), or displays images or video through the display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional module, independent of the processor 110.

The wireless communication module 160 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN), bluetooth, global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), NFC, infrared technology (IR), etc. applied on the terminal device 400. The wireless communication module 160 may be one or more devices that integrate at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation via the antenna 2.

In some embodiments, antenna 1 and mobile communication module 150 of terminal device 400 are coupled, and antenna 2 and wireless communication module 160 are coupled, such that terminal device 400 may communicate with a network and other devices via wireless communication techniques. The wireless communication techniques may include GSM, GPRS, CDMA, WCDMA, TD-SCDMA, LTE, GNSS, WLAN, NFC, FM, and/or IR techniques, among others. The GNSS may include a global satellite positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a Beidou satellite navigation system (bei dou navigation satellite system, BDS), a quasi zenith satellite system (quasi-zenith satellite system, QZSS) and/or a satellite based augmentation system (satellite based augmentation systems, SBAS).

The terminal device 400 may implement a display function through a GPU, a display screen 194, an application processor, and the like. The application processor may include an NPU and/or a DPU. The GPU is a microprocessor for image processing, and is connected to the display 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute instructions to generate or change display information. The NPU is a neural-network (NN) computing processor, and can rapidly process input information by referencing a biological neural network structure, for example, referencing a transmission mode between human brain neurons, and can also continuously perform self-learning. Applications such as intelligent awareness of the terminal device 400 may be implemented by the NPU, for example: image recognition, face recognition, speech recognition, text understanding, etc. The DPU is also referred to as a display sub-system (DSS) and is used to adjust the color of the display screen 194, which may be adjusted by a color three-dimensional look-up table (3D look up table,3D LUT). The DPU can also perform processes such as scaling, noise reduction, contrast enhancement, backlight brightness management, hdr processing, display parameter Gamma adjustment, and the like on the picture.

The display screen 194 is used to display images, videos, and the like. The display 194 includes a display panel. The display panel may employ a liquid crystal display (liquid crystal display, LCD), an organic light-emitting diode (OLED), an active-matrix organic light emitting diode (AMOLED), a flexible light-emitting diode (FLED), miniled, microLed, micro-OLED, or a quantum dot light-emitting diode (quantum dot light emitting diodes, QLED). In some embodiments, the terminal device 400 may include 1 or N display screens 194, N being a positive integer greater than 1.

The terminal device 400 may implement photographing functions through an ISP, one or more cameras 193, a video codec, a GPU, one or more display screens 194, an application processor, and the like.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to realize expansion of the memory capability of the terminal device 400. The external memory card communicates with the processor 110 through an external memory interface 120 to implement data storage functions. For example, data files such as music, photos, videos, etc. are stored in an external memory card.

The internal memory 121 may be used to store one or more computer programs, including instructions. The processor 110 may cause the terminal device 400 to execute various functional applications, data processing, and the like by executing the above-described instructions stored in the internal memory 121. The internal memory 121 may include a storage program area and a storage data area. The storage program area can store an operating system; the storage area may also store one or more applications (e.g., gallery, contacts, etc.), and so forth. The storage data area may store data (e.g., photos, contacts, etc.) created during use of the terminal device 400, etc. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like. In some embodiments, processor 110 may cause terminal device 400 to perform various functional applications and data processing by executing instructions stored in internal memory 121, and/or instructions stored in a memory provided in processor 110.

The terminal device 400 may implement audio functions through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor, etc. Such as music playing, recording, etc. Wherein the audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or a portion of the functional modules of the audio module 170 may be disposed in the processor 110. The speaker 170A, also referred to as a "horn," is used to convert audio electrical signals into sound signals. The terminal device 400 can listen to music through the speaker 170A, or listen to handsfree talk. A receiver 170B, also referred to as a "earpiece", is used to convert the audio electrical signal into a sound signal. When the terminal device 400 receives a call or voice message, it is possible to receive voice by bringing the receiver 170B close to the human ear. Microphone 170C, also known as a "microphone" or "microphone," is used to convert sound signals into electrical signals. When making a call or transmitting voice information, the user can sound near the microphone 170C through the mouth, inputting a sound signal to the microphone 170C. The terminal device 400 may be provided with at least one microphone 170C. In other embodiments, the terminal device 400 may be provided with two microphones 170C, and may implement a noise reduction function in addition to collecting sound signals. In other embodiments, the terminal device 400 may be further provided with three, four or more microphones 170C to collect sound signals, reduce noise, identify the source of sound, implement directional recording functions, etc. The earphone interface 170D is used to connect a wired earphone. The earphone interface 170D may be a USB interface 130, or may be a 3.5mm open mobile terminal platform (open mobile terminal platform, OMTP) standard interface, or may be a american cellular telecommunications industry association (cellular telecommunications industry association of the USA, CTIA) standard interface.

The sensors 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

The software system of the terminal device 400 may employ a layered architecture, an event driven architecture, a micro-core architecture, a micro-service architecture, or a cloud architecture. In the embodiment of the application, taking an Android system with a layered architecture as an example, a software structure of the terminal device 400 is illustrated.

Fig. 5 is a block diagram of a software architecture of a terminal device to which an embodiment of the present application is applicable. The layered architecture divides the software system of the terminal device 400 into several layers, each layer having a distinct role and division of labor. The layers communicate with each other through a software interface. In some embodiments, the Android system may be divided into an application layer (APP), an application framework layer (application framework), an Zhuoyun rows (Android run) and libraries, a hardware abstraction layer (hardware abstraction layer, HAL), and a kernel layer (kernel). In some embodiments, the terminal device 400 also includes hardware (e.g., a camera, a display screen).

The application layer may include a series of application packages that run applications by calling an application program interface (application programming interface, API) provided by the application framework layer. As shown in fig. 5, the application package may include applications for cameras, calendars, maps, phones, music, WLAN, bluetooth, video, social, gallery, navigation, short messages, etc.

The application framework layer provides APIs and programming frameworks for application programs of the application layer. The application framework layer includes a number of predefined functions. The framework layer provides programming services (e.g., camera services, media services) to the application layer calls through the API interface. As shown in fig. 5, the application framework layer may include a window manager, a content provider, a resource manager, a notification manager, a view system, a telephony manager, and the like.

The window manager is used for managing window programs. The window manager can acquire the size of the display screen, judge whether a status bar exists, lock the screen, intercept the screen and the like.

The content provider is used to store and retrieve data and make such data accessible to applications. The data may include video images, audio, calls made and received, browsing history and bookmarks, phonebooks, etc. The view system includes visual controls, such as controls to display text, controls to display pictures, and the like.

The view system may be used to build applications. The display interface may be composed of one or more views. For example, a display interface including a text message notification icon may include a view displaying text and a view displaying a picture.

The telephony manager is used to provide the communication functions of the terminal device 400. Such as the management of call status (including on, hung-up, etc.).

The resource manager provides various resources for the application program, such as localization strings, icons, pictures, layout files, video files, and the like.

The notification manager allows the application to display notification information in a status bar, can be used to communicate notification type messages, can automatically disappear after a short dwell, and does not require user interaction. Such as notification manager is used to inform that the download is complete, message alerts, etc. The notification manager may also be a notification in the form of a chart or scroll bar text that appears on the system top status bar, such as a notification of a background running application, or a notification that appears on the screen in the form of a dialog window. For example, a text message is presented in a status bar, a presentation sound is emitted, the terminal device 400 vibrates, and an indicator light blinks.

The android runtime includes a core library and virtual machines. And the android running time is responsible for scheduling and managing an android system. The core library consists of two parts: one part is a function to be called by a java language used by the java API framework, and the other part is a core library of android. The application layer and the application framework layer run in a virtual machine. The virtual machine executes java files of the application program layer and the application program framework layer as binary files. The virtual machine is used for executing the functions of object life cycle management, stack management, thread management, security and exception management, garbage collection and the like. The system library may include a plurality of functional modules. For example: surface manager (surface manager), media library (media library), three-dimensional graphics processing library (e.g., openGL ES), 2D graphics engine (e.g., SGL), etc.

The surface manager is used to manage the display subsystem and provides a fusion of 2D and 3D layers for multiple applications. Media libraries support a variety of commonly used audio, video format playback and recording, still image files, and the like. The media library may support a variety of audio video encoding formats, such as: MPEG4, h.264, MP3, AAC, AMR, JPG, PNG, etc. The three-dimensional graphic processing library is used for realizing three-dimensional graphic drawing, image rendering, synthesis, layer processing and the like. The 2D graphics engine is a drawing engine for 2D drawing.

The hardware abstraction layer is an abstract interface driven by the device kernel, and provides an application program interface for accessing the bottom layer device for a java API framework at a higher level. The hardware abstraction layer may include a plurality of library modules, each of which may implement an interface for a particular type of hardware component, e.g., a camera interface, etc. When the framework API requires access to the device hardware, the Android system will load the library module for that hardware component. Illustratively, as shown in FIG. 5, the library module includes a cut control module and a multi-shot control module.

In the embodiment of the application, after the camera application responds to the magnification point cutting operation of the user (switching from the first magnification to the second magnification), the shearing control module is used for determining the magnification interval to obtain a plurality of transition magnifications from the first magnification to the second magnification. The multi-camera control module is used for starting or stopping cameras and is used for realizing switching among the cameras.

The kernel layer is a layer between hardware and software. The kernel layer is used for driving the hardware so that the hardware works. Illustratively, as shown in FIG. 5, the kernel layer contains camera drivers.

The hardware layer comprises a camera module and a display screen, wherein the camera module comprises at least one camera.

It should be understood that the terminal device in the embodiment of the present application may have the architecture shown in fig. 4 and/or fig. 5, which is not limited to the embodiment of the present application.

In a possible scene, the camera module of the terminal device comprises a first camera and a second camera, the switching between the first camera and the second camera may be involved in the process of multiplying power point cutting operation, and a user can acquire richer videos and photographing experiences through the first camera and the second camera. The magnification click switching process in this scenario is described below with reference to fig. 6 and 7.

Fig. 6 is a schematic diagram of a point cutting operation according to an embodiment of the present application. Taking the example where the terminal device includes a first camera (e.g., a main camera) and a second camera (e.g., a telephoto lens), in fig. 6, illustratively, before the user performs a pinch-out operation of magnification, the FOV of the first camera is maintained at a magnification of 1x to acquire an image, and a preview image is displayed on the display screen.

Illustratively, at the point-and-cut time shown in fig. 6, the user clicks the magnification icon of 10x to perform magnification switching, and after the point-and-cut operation occurs, the terminal device may determine a magnification interval, and perform gear division between the first magnification and the second magnification, to obtain a plurality of transition magnifications between 1x and 10 x. As shown in fig. 6, taking a magnification interval of 0.5x as an example, a plurality of transition magnifications that can be obtained after 1x by the terminal device include: 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, 8x, 8.5x, 9x, 9.5x. The cameras (the first camera and/or the second camera) of the terminal equipment can sequentially obtain images according to the sequence from small transition multiplying power to large transition multiplying power, and the terminal equipment can finish smooth transition of the preview images until the preview images under 10x are obtained and displayed.

For example, as shown in fig. 6, the terminal device may activate the second camera before acquiring the preview image at the 1 st transition magnification (1.5×) after the user's point-cut operation for the second magnification occurs.

As shown in fig. 6, in response to an operation of a user to cut from a magnification point of 1x to 10x, the terminal device first determines that the magnification interval is 0.5x, then the terminal device determines that the next magnification after 1x is 1.5x, and the terminal device may start the second camera to acquire the preview image before the magnification transitions to 1.5 x. After the second camera is started, for the first camera, the first camera can sequentially acquire multi-frame transition preview images under 1.5x, 2x, 2.5x, 3x, 3.5x and 4x, and sequentially display the multi-frame transition preview images in a preview view frame. For the second camera, the second camera may sequentially acquire multi-frame images at 1.5x, 2x, 2.5x, 3x, 3.5x, and 4x, but the multi-frame images are not displayed in the preview frame.

When the magnification transitions to 4.5x, if the difference between the quality of the image acquired by the second camera at the magnification of 4.5x and the quality of the image acquired by the first camera at the magnification of 4.5x is less than or equal to a preset threshold, the terminal device may stop the first camera after displaying the preview image acquired by the first camera at the magnification of 4.5x, switch to the second camera to sequentially acquire multiple frames of images at 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, 8x, 8.5x, 9x, 9.5x, and sequentially display the multiple frames of preview images in the preview view frame.

In the embodiment of the application, the terminal equipment can obtain the preview images under a plurality of transition multiplying powers by determining the multiplying power intervals and sequentially display the preview images in the preview view frame, so that smooth transition from 1x point cutting to 10x point cutting can be realized, the preview images in the smooth transition are displayed in the preview view frame, and the zooming effect of the terminal equipment is improved.

In addition, after the point cutting operation occurs, the terminal equipment can start the second camera to realize two paths of pictures of the first camera and the second camera, so that soft switching between the first camera and the second camera is realized, the problem that preview images caused by switching different cameras are hard in transition is solved, and the zooming effect of the terminal equipment under different camera switching scenes is improved.

The following describes a magnification switching method according to an embodiment of the present application with reference to fig. 7, in which operations performed by each layer in the layered architecture are performed.

Fig. 7 is a schematic flow chart of a magnification switching method 700 according to an embodiment of the present application. The steps of the method 700 may be performed by the terminal device 400, where the camera module of the terminal device 400 may include a first camera and a second camera, and the hardware abstraction layer of the terminal device 400 includes a clipping control module and a multi-shot control module, but the embodiment of the application is not limited thereto. The method 700 includes the steps of:

s701, the first camera is used for drawing and displaying under the first multiplying power.

S702, responding to the point cutting operation of a user, the camera application sends a magnification switching request message to the cutting control module, wherein the magnification switching request message is used for requesting to switch from a first magnification to a second magnification, and the magnification switching request message comprises the first magnification and the second magnification. Correspondingly, the shear control module receives the multiplying power switching request message.

S703, determining the multiplying power interval by the shearing control module according to preset parameters.

The preset parameters include, for example, a preset switching duration or a preset preview image frame number. The switching duration represents a duration limit that the terminal device switches from the preview view under the first magnification to the preview image under the second magnification which can be displayed in the preview view frame after the user performs the magnification point cutting operation. The preview image frame number indicates the number of frames of the preview image for transition required for the terminal device to display the preview image at the second magnification in the preview frame.

Illustratively, the switching duration is 0.1s, and the transition time between preview images under adjacent transition magnifications is 0.02s, if the transition between preview images is to be switched from 1x to 5x, then up to 5 times of transition of preview images can be completed within 1s, then the terminal device can determine that the magnification interval is 1x, and realize the transition from 1x, 2x, 3x, 4x, up to 5x, and the transition is 0.08s in common. The terminal device may also determine that the magnification interval is 2x, and first transitions from 1x, 3x to 5x, for 0.04s.

Illustratively, the number of frames of the preview image is 3 frames, and if switching from 1x to 5x is to be performed, the terminal device may determine that the magnification interval is 1x, implement transition from 1x, 2x, 3x, 4x, up to 5x, and the number of frames of the preview image for transition is 3 frames.

For example, the number of frames of the preview image is 7 frames, and the terminal device may further determine that the magnification interval is 0.5x, to implement a transition from 1x, 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x to 5x, and the number of frames of the preview image for the transition is 7 frames.

It should be understood that, in order to obtain a smoother transition effect, the terminal device may determine a finer magnification interval, and the specific value of the magnification interval in the embodiment of the present application is not limited.

S704, determining the transition multiplying power by the shearing control module according to the multiplying power interval.

S705, the multi-camera control module sends a camera hold request message to the first camera, where the camera hold request message is used to request the first camera to keep on, and the camera hold request message may include a transition magnification. Accordingly, the first camera receives the camera hold request message.

S706, the first camera is continuously started to obtain a preview image under the transition multiplying power.

S707, the first camera transmits the preview image at the transition magnification to the camera application. Accordingly, the camera application receives the preview image.

S708, the camera application displays the preview image at the transition magnification in the preview view frame.

It should be appreciated that before switching from the first camera to the second camera, the camera application displays in the preview view frame a preview image obtained by the first camera. After switching from the first camera to the second camera, the camera application displays in the preview view frame a preview image obtained by the second camera.

S709, the multi-shot control module sends a camera activation request message to the second camera, where the camera activation request message is used to request activation of the second camera, and the camera activation request message may include a transition magnification. Correspondingly, the second camera receives the camera start request message.

S710, the second camera is started to obtain a preview image under the transition multiplying power.

The above-described steps S704 to S710 are repeatedly performed until the preview images obtained by the first camera and the second camera at the target transition magnification satisfy the preset condition, and the following steps S711 to S715 are performed.

Optionally, the preset condition may include: the difference between the quality of the image obtained by the second camera under the target transition multiplying power and the quality of the image obtained by the first camera under the target transition multiplying power is smaller than or equal to a preset threshold value.

For example, with a peak signal-to-noise ratio (PSNR) of an image as an evaluation index for evaluating the quality of the image, if the preset threshold is 5dB, the PSNR of the image obtained by the second camera at the target transition magnification is 40dB, the PSNR of the image obtained by the first camera at the target transition magnification is 43dB, and the difference is 3dB <5dB, the multi-shot control module may control the first camera to be turned off, switch to the second camera to continuously obtain the image, and display the preview image in the preview view frame.

Taking the case that the magnification interval is 0.5x, the first magnification is 1x, the second magnification is 10x, and the target magnification is 5x as an example, for S704, the shear control module may determine that the first transition magnification after the first magnification of 1x is 1.5x according to the magnification interval, then the first camera obtains a preview image under 1.5x and sends the preview image to the camera application to display the preview image under 1.5x in the preview view frame, and the second camera also obtains the preview image under 1.5x but does not display the preview view frame. Then, the clipping control module can determine that the transition magnification after 1.5x is 2x according to the magnification interval, then the first camera obtains a preview image under 2x and sends the preview image under 2x to the camera application to display the preview image under 2x in the preview view frame, the second camera also obtains the preview image under 2x but does not display the preview view frame, and the above steps are circulated, the first camera sequentially obtains and displays the preview image under the transition magnification (2.5 x, 3x, 3.5x, 4x, 4.5x, 5 x) after the preview view frame, and the second camera sequentially obtains the preview image under the transition magnification (2.5 x, 3x, 3.5x, 4x, 4.5x, 5 x) after the preview image is not displayed in the preview view frame.

For example, a mean square error (mean square error, MSE), a signal-to-noise ratio (SNR), or a mean absolute error (mean absolute error, MAE) of an image may also be used as an evaluation index for evaluating the quality of the image, which is not limited by the embodiment of the present application.

S711, the multi-camera control module sends a camera closing request message to the first camera, where the camera closing request message is used to request closing of the first camera. Correspondingly, the first camera receives the camera closing request message.

S712, the first camera is closed, and the work is stopped.

S713, the second camera obtains a preview image at a transition magnification after the target transition magnification.

S714, the second camera sends the preview image at the transition magnification after the target transition magnification to the camera application, and accordingly, the camera application receives the preview image.

For S711 to S714, the first camera is turned off, the second camera continues to draw a picture and sends the preview image to the preview frame for display, thus completing the soft handoff between cameras.

S715, the camera application displays the preview image at the transition magnification after the target transition magnification in the preview view frame.

The above-described S713 to S715 are repeatedly performed until the camera application displays the preview image at the second magnification in the preview view frame.

Taking the example of the magnification interval of 0.5x, the first magnification of 1x, the second magnification of 10x and the target magnification of 5x, the second camera acquires the preview image under 5.5x and sends the preview image to the preview view frame for display, and the second camera sequentially acquires the preview images under the transition magnifications (6 x, 6.5x, 7x, 7.5x, 8x, 8.5x, 9x and 9.5 x) after the preview image is acquired by the second camera, and the camera applies the preview image under the transition magnifications after the preview view frame is displayed until the camera applies the preview image under the second magnification (10 x) is displayed in the preview view frame. Therefore, smooth transition of the preview image can be realized in the magnification point cutting process, and the zooming effect of the terminal equipment is improved.

In this embodiment, the shear control module may sequentially determine the transition magnifications according to the magnification intervals. Optionally, the shear control module may further directly determine a plurality of transition magnifications, where the plurality of transition magnifications may be equally spaced or unequally spaced, which is not limited by the embodiment of the present application.

In one possible scenario, the camera module of the terminal device includes at least one camera, and during the magnification point cutting operation, preview images under different magnifications can be obtained by the same camera and displayed in a preview view frame, that is, switching between the cameras is not involved. The magnification click switching process in this scenario is described below with reference to fig. 8.

Fig. 8 is a schematic flow chart of another magnification switching method 800 provided by an embodiment of the present application. The steps of the method 800 may be performed by the terminal device 400, where the camera module of the terminal device 400 may include a first camera, and the hardware abstraction layer of the terminal device 400 includes a clipping control module, but the embodiment of the application is not limited thereto. The method 800 includes the steps of:

s801, the first camera is used for drawing and displaying under the first multiplying power.

S802, responding to a point cutting operation of a user, sending a magnification switching request message to a cutting control module by a camera application, wherein the magnification switching request message is used for requesting to switch from a first magnification to a second magnification, and comprises the first magnification and the second magnification. Correspondingly, the shear control module receives the multiplying power switching request message.

S803, the shearing control module determines a multiplying power interval according to preset parameters.

S804, the shearing control module determines the transition multiplying power according to the multiplying power interval.

S805, the shearing control module sends the transition multiplying power to the first camera. Correspondingly, the first camera acquires the transition multiplying power.

S806, the first camera obtains a preview image under the transition multiplying power.

S807, the first camera transmits the preview image at the transition magnification to the camera application. Accordingly, the camera application receives the preview image.

S808, the camera application displays the preview image at the transition magnification in the preview view frame.

The above S804 and S808 are repeatedly performed until the camera application displays the preview image at the second magnification in the preview view frame.

The manner of determining the magnification interval and determining the transition magnification may refer to an embodiment as described in the method 700, and will not be described herein.

In the embodiment of the application, the terminal equipment can respond to the click operation of the user, and the first camera is used for completing preview shooting under different multiplying powers, so that the first camera can sequentially obtain transition preview images under a plurality of transition multiplying powers, thereby being beneficial to realizing smooth transition of the preview images in the process of the multiplying power click operation and improving the zooming effect of camera application.

In summary, an embodiment of the present application provides still another magnification switching method 900, as shown in fig. 9, where the method 900 may be applied to a terminal device deployed with a camera, and the method 900 includes the following steps:

s901, displaying a first preview image under a first multiplying power obtained by a camera;

s902, responding to a selection operation of a user on a second multiplying power, displaying L frame preview images corresponding to L transition multiplying powers, wherein the L transition multiplying powers comprise L multiplying powers between the first multiplying power and the second multiplying power, and L is more than or equal to 1 and is an integer;

S903, displaying a second preview image under a second magnification acquired by the camera.

In the embodiment of the application, before the user selects the second magnification, the terminal device can obtain the first preview image under the first magnification. After the user selects the second multiplying power, the terminal device can display the L-frame preview images according to the L transition multiplying powers before displaying the second preview images, so that the effect of smoothly transiting from the first preview image to the second preview image is achieved, the zooming effect of the terminal device is improved, and the use experience of the user is improved.

The operation of selecting the second magnification by the user may include selecting the second magnification by the user by clicking the magnification icon as shown in fig. 1, or may include selecting the second magnification by the user among the multiple magnifications in other manners, which is not limited in the embodiment of the present application.

It should be understood that the L-frame preview image is used for transition from the first preview image to the second preview image, and the L-frame preview image is captured by the terminal device in time sequence.

It should also be understood that the user may implement the zooming-in effect on the preview image through the selection operation of the second magnification, or may implement the zooming-out effect on the preview image through the selection operation of the second magnification, which is not limited in the embodiment of the present application.

Illustratively, the first magnification is 1x, the second magnification is 7x, and the transition magnifications are 2x, 3x, 4x, 5x, and 6x in order from small to large, and total 5 transition magnifications. Correspondingly, the terminal device can sequentially display preview images acquired by the cameras under 2x, 3x, 4x, 5x and 6 x.

Illustratively, the first magnification is 7x, the second magnification is 1x, and the transition magnification may be 6x, 5x, 4x, 3x, 2x in order from large to small, for a total of 5 transition magnifications. Correspondingly, the terminal device can sequentially display preview images acquired by the cameras under 6x, 5x, 4x, 3x and 2 x.

As an alternative embodiment, prior to S902, method 900 further includes: l transition magnifications are determined based on the first and second magnifications.

In one possible implementation, determining L transition magnifications based on the first and second magnifications includes: and determining L transition magnifications based on the first magnification, the second magnification, the switching duration between the first magnification and the second magnification, and the time interval between adjacent frames.

In this manner, the switching duration between the first magnification and the second magnification may be a preset switching duration as described in the embodiment shown in fig. 7, and the description of S703 may be specifically referred to, which is not repeated herein.

In one possible implementation, determining L transition magnifications based on the first and second magnifications includes: and determining L transition multiplying powers based on the first multiplying power, the second multiplying power and the preset preview image frame number.

In this embodiment, the preset number of frames of the preview image may be the preset number of frames of the preview image as described in the embodiment shown in fig. 7, and the description of S703 may be specifically referred to, which is not repeated here.

As an alternative embodiment, the cameras in method 900 include a first camera and a second camera, the first preview image from the first camera and the second preview image from the second camera. The method 900 further includes: and starting the second camera, and acquiring images through the first camera and the second camera, wherein the images acquired by the first camera and the second camera at the same time node are shot based on the same transition multiplying power. When the difference between the quality of the Mth frame image from the second camera and the quality of the Nth frame image from the first camera is smaller than or equal to a preset threshold value, the first camera is closed, and the preview image displayed before the first camera is closed is from the first camera. The N-th frame image from the first camera is obtained by shooting at the same time point with the M-th frame image from the second camera based on the same transition multiplying power, N is more than or equal to M is more than or equal to 1, and N and M are integers.

In the embodiment of the application, the selection operation of the user on the second multiplying power relates to the scene switched among different cameras. The two-way image drawing mode of the first camera and the second camera is beneficial to improving the quality of preview images, the image algorithm of the terminal equipment can perform feature optimization through more preview images, and the cameras for sending and displaying are switched when appropriate, so that the focusing stability and the smooth transition effect are improved.

In one possible implementation, the terminal device acquires an image at a first magnification by the first camera and displays the image acquired from the first camera, i.e., the first preview image. After that, the terminal device may start the second camera, and acquire the image under the transition magnification through the first camera and the second camera. In this way, the first camera may acquire images based on the same transition magnification at the same point in time as the second camera, where m+.n.

Taking fig. 6 as an example, the terminal device turns on the second camera after displaying the preview image from under the first camera 1 x. L=17 transition magnifications are shared between 1x and 10x, and the first camera and the second camera can acquire images under the transition magnifications at the same time node. Assuming that m=7 and n=8, that is, the transition magnification corresponding to the 8 th frame image of the first camera and the 7 th frame image of the second camera is 4.5x, that is, the difference between the quality of the 7 th frame image from the second camera and the quality of the 8 th frame image from the first camera is less than or equal to the preset threshold, the terminal device may close the first camera.

The preset threshold may be a preset threshold as described in the embodiment shown in fig. 7, and in particular, reference may be made to the description of S710, which is not repeated herein.

In another possible implementation manner, the terminal device acquires an image at a first magnification through the first camera, and displays the image acquired from the first camera, that is, the first preview image. Meanwhile, the terminal device has turned on the second camera, acquires an image at the first magnification through the second camera but does not display the image acquired by the second camera. In this way, if the difference between the quality of the image acquired by the second camera at the first magnification (i.e., the first preview image) and the quality of the image acquired by the first camera at the first magnification is less than or equal to the preset threshold, then m=n.

Taking fig. 6 as an example, assume that, before the time for starting the second camera in the drawing is advanced to the point cutting time, the terminal device acquires images at a magnification of 1x through the first camera and the second camera, and displays a preview image acquired from the first camera at the magnification of 1 x. If the difference between the quality of the preview image acquired by the second camera at the magnification of 1x and the quality of the preview image acquired by the first camera at the magnification of 1x is smaller than or equal to a preset threshold, the terminal device may close the first camera after displaying the preview image acquired by the first camera at the magnification of 1x, and then acquire and display the preview image at the transition magnification through the second camera until acquiring and displaying the preview image at 10 x. In this case, n=m=1.

Similarly, there may be cases where n=m=2, n=m=3, n=m=4, and the like. Taking n=m=2 as an example, the terminal device acquires images at 1x and 1.5x magnification by the first camera and the second camera, and displays the preview images acquired at 1x and 1.5x magnification from the first camera, and if a difference between the quality of the preview image acquired at 1.5x magnification by the second camera and the quality of the preview image acquired at 1.5x magnification by the first camera is less than or equal to a preset threshold, the terminal device may close the first camera after displaying the preview images acquired at 1.5x magnification from the first camera.

It should be understood that, regardless of the values of M and N, after the first camera is turned off, the terminal device may display the preview image acquired by the turned-on second camera, so as to implement smooth transition of magnification and improve the zoom effect of the terminal device.

It should also be understood that in the above embodiment, the soft handoff process before the terminal device includes the first camera and the second camera is described by taking an example, but the number of cameras of the terminal device is not limited in the embodiment of the present application. The terminal device may further include a third camera, and may further be switched to the third camera by the second camera after the user clicks the switching operation.

Illustratively, the first camera is an ultra-wide angle camera, the second camera is a wide angle camera, the third camera is a tele camera, the range of magnification supported by the ultra-wide angle camera is assumed to be-1 x, the range of magnification supported by the wide angle camera is 1x to 3.5x, and the range of magnification supported by the tele camera is 4x to 7x.

The terminal equipment can start the super-wide-angle camera when the multiplying power is-1 x, display preview images from the super-wide-angle camera, and start the wide-angle camera when the multiplying power of clicking switching of a user is within the multiplying power range supported by the wide-angle camera, determine the transition multiplying power, and display preview images acquired from the wide-angle camera at proper time through double-path drawing of the super-wide-angle camera and the wide-angle camera. When the click switching multiplying power of the user is in the multiplying power range supported by the tele camera, the terminal equipment starts the tele camera, determines the transition multiplying power, and displays preview images acquired by the tele camera at proper time through the two-way drawing of the wide-angle camera and the tele camera. The preview image of smooth transition is conveniently displayed in the mode of the two paths of pictures, and the zooming effect of the terminal equipment is improved.

Fig. 10 is an interface schematic diagram of a terminal device according to an embodiment of the present application. Taking a terminal device as an example of a mobile phone, an interface a, an interface b and an interface c of the mobile phone are shown in fig. 10. Where the interface a shows multiple applications in the handset, the user may click on the camera icon to open the camera application to take a picture, for example. After the user clicks the camera application, the mobile phone displays a b interface, wherein the b interface is a shooting interface. Illustratively, the b interface includes multiple magnification icons, the current camera magnification is 1x, and the user can click on different magnification icons to achieve different magnification switching. Illustratively, the user clicks the magnification icon of 5x, and the mobile phone may sequentially display the c interface to the f interface. In interface c, the terminal device may display a preview image of the first frame for transition, in interface d, the terminal device displays a preview image of the second frame for transition, in interface e, the terminal device displays a preview image of the third frame for transition, in interface f, the terminal device may display a preview image of the final 5x interface.

Compared with fig. 1, it can be seen that, in the magnification switching method provided by the embodiment of the application, after the clicking switching operation of the magnification occurs, a plurality of frames of preview images for transition are displayed for the user, so that the purpose of smooth transition is achieved, the zooming effect of the terminal device is improved, and the use experience of the user is improved.

It should be understood that the number of preview images displayed in fig. 10 is merely an example, and preview images of corresponding frames may be actually displayed according to the number of specific transition magnifications, which is not limited in the embodiment of the present application.

It should be understood that the sequence numbers of the above processes do not mean the order of execution, and the execution order of the processes should be determined by the functions and internal logic of the processes, and should not be construed as limiting the implementation process of the embodiments of the present application.

The magnification switching method according to the embodiment of the present application is described in detail above with reference to fig. 4 to 10, and the magnification switching device according to the embodiment of the present application will be described in detail below with reference to fig. 11 and 12.

Fig. 11 shows a schematic block diagram of a magnification switching device 1100 according to an embodiment of the present application, where the device 1100 includes an acquisition module 1110 and a processing module 1120.

Wherein, the obtaining module 1110 is configured to: acquiring a first preview image under a first multiplying power; and acquiring a second preview image at a second magnification. The processing module 1120 is configured to: displaying a first preview image under a first multiplying power obtained by a camera; responding to the selection operation of the user on the second magnification, displaying L frame preview images corresponding to L transition magnifications, wherein the L transition magnifications comprise L magnifications between the first magnification and the second magnification, and L is more than or equal to 1 and is an integer; and displaying a second preview image under the second multiplying power acquired by the camera.

Optionally, the processing module 1120 is configured to: l transition magnifications are determined based on the first and second magnifications.

Optionally, the processing module 1120 is configured to: and determining L transition magnifications based on the first magnification, the second magnification, the switching duration between the first magnification and the second magnification, and the time interval between adjacent frames.

Optionally, the processing module 1120 is configured to: and determining L transition multiplying powers based on the first multiplying power, the second multiplying power and the preset preview image frame number.

Optionally, the camera includes a first camera and a second camera, the first preview image is from the first camera, and the second preview image is from the second camera. The processing module 1120 is configured to: and starting the second camera. The acquisition module 1110 is configured to: acquiring images through a first camera and a second camera, wherein the images acquired by the first camera and the second camera at the same time node are shot based on the same transition multiplying power; and closing the first camera when the difference between the quality of the Mth frame image from the second camera and the quality of the Nth frame image from the first camera is smaller than or equal to a preset threshold value, and displaying a preview image from the first camera before closing the first camera. The N-th frame image from the first camera is obtained by shooting at the same time point with the M-th frame image from the second camera based on the same multiplying power, N is more than or equal to M is more than or equal to 1, and N and M are integers.

In an alternative example, it will be appreciated by those skilled in the art that the apparatus 1100 may be embodied as a terminal device in the above embodiment, or the functions of the terminal device in the above embodiment may be integrated in the apparatus 1100. The above functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The apparatus 1100 may be configured to perform the respective processes and/or steps corresponding to the terminal device in the above-described method embodiment.

It should be appreciated that the apparatus 1100 herein is embodied in the form of functional modules. The term module herein may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an embodiment of the present application, the apparatus 1100 in fig. 11 may also be a chip or a chip system, for example: system on chip (SoC).

Fig. 12 shows a schematic block diagram of another magnification switching device 1200 provided by an embodiment of the present application. The apparatus 1200 includes a processor 1210, a transceiver 1220, and a memory 1230. Wherein the processor 1210, the transceiver 1220 and the memory 1230 are in communication with each other through an internal connection path, the memory 1230 is used for storing instructions, and the processor 1210 is used for executing the instructions stored in the memory 1230 to control the transceiver 1220 to transmit signals and/or receive signals.

It should be understood that the apparatus 1200 may be specifically a terminal device in the foregoing embodiment, or the functions of the terminal device in the foregoing embodiment may be integrated in the apparatus 1200, and the apparatus 1200 may be used to perform the steps and/or flows corresponding to the terminal device in the foregoing method embodiment. The memory 1230 may optionally include read-only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store information of the device type. The processor 1210 may be configured to execute instructions stored in the memory, and when the processor executes the instructions, the processor may perform steps and/or flows corresponding to the terminal device in the above-described method embodiments.

It is to be appreciated that in embodiments of the application, the processor 1210 may be a central processing unit (central processing unit, CPU), which may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system, apparatus and module may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a specific implementation of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art may easily think about changes or substitutions within the technical scope of the embodiments of the present application, and all changes and substitutions are included in the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

1. A magnification switching method, which is applied to a terminal device with a camera disposed, the method comprising:

displaying a first preview image under a first multiplying power acquired by the camera;

responding to the selection operation of a user on a second magnification, displaying L frame preview images corresponding to L transition magnifications, wherein the L transition magnifications comprise L magnifications between the first magnification and the second magnification, and L is more than or equal to 1 and is an integer;

and displaying a second preview image under the second multiplying power, which is acquired by the camera.

2. The method of claim 1, wherein before the L-frame preview images corresponding to the L transition magnifications are displayed in response to the user selection operation of the second magnification, the method further comprises:

And determining the L transition multiplying powers based on the first multiplying power and the second multiplying power.

3. The method of claim 2, wherein the determining the L transition magnifications based on the first and second magnifications comprises:

and determining the L transition multiplying powers based on the first multiplying power, the second multiplying power, the switching duration between the first multiplying power and the second multiplying power and the time interval between adjacent frames.

4. The method of claim 2, wherein the determining the L transition magnifications based on the first and second magnifications comprises:

and determining the L transition multiplying powers based on the first multiplying power, the second multiplying power and the preset preview image frame number.

5. The method of any one of claims 1 to 4, wherein the camera comprises a first camera and a second camera, the first preview image from the first camera and the second preview image from the second camera;

the method further comprises the steps of:

starting the second camera;

acquiring images through the first camera and the second camera, wherein the images acquired by the first camera and the second camera at the same time node are shot based on the same transition multiplying power;

When the quality difference between the Mth frame image from the second camera and the Nth frame image from the first camera is smaller than or equal to a preset threshold value, the first camera is closed, and the preview image displayed before the first camera is closed is from the first camera, wherein the Nth frame image from the first camera and the Mth frame image from the second camera are shot at the same time node based on the same multiplying power, N is larger than or equal to M is larger than or equal to 1, and N and M are integers.

6. A magnification switching device comprising means for performing the method of any one of claims 1-5.

7. A magnification switching device, characterized by comprising: a processor coupled to a memory for storing a computer program, which when invoked by the processor, causes the apparatus to perform the method of any one of claims 1-5.

8. A terminal device, comprising: a processor, a memory for storing instructions, and a transceiver for communicating with other devices, the processor for executing the instructions stored in the memory to cause the terminal device to perform the method of any of claims 1-5.

9. A computer readable storage medium for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1-5.

10. A computer program product comprising computer program code embodied therein, which when run on a computer causes the computer to implement the method of any of claims 1-5.